Question

math class:
answer each question below using equivalent fractions but write your answers as percentages.

1. 18 students out of 30 picked gym as their favorite subject. what percent of students picked gym as their favorite subject?
2. 3 out of 150 students wore blue bows in their hair today. what percent of students wore blue bows?
3. a choir has 12 sopranos and 28 altos. what percentage of the choir’s members are altos?
4. burger king sold 50 meals between 12:00 and 12:30. 30 of the meals were kids’ meals. what percent were not kids meals?

Explanation:

Problem 1:

Step1: Find the fraction

The fraction of students who picked gym is $\frac{18}{30}$.

Step2: Simplify the fraction

Simplify $\frac{18}{30}$ to $\frac{3}{5}$ (dividing numerator and denominator by 6).

Step3: Convert to percentage

To convert a fraction to a percentage, multiply by 100. So $\frac{3}{5} \times 100 = 60\%$.

Step1: Find the fraction

The fraction of students who wore blue bows is $\frac{3}{150}$.

Step2: Simplify the fraction

Simplify $\frac{3}{150}$ to $\frac{1}{50}$ (dividing numerator and denominator by 3).

Step3: Convert to percentage

Multiply $\frac{1}{50}$ by 100: $\frac{1}{50} \times 100 = 2\%$.

Step1: Find total members

Total choir members = $12 + 28 = 40$.

Step2: Find the fraction of altos

The fraction of altos is $\frac{28}{40}$.

Step3: Simplify the fraction

Simplify $\frac{28}{40}$ to $\frac{7}{10}$ (dividing numerator and denominator by 4).

Step4: Convert to percentage

Multiply $\frac{7}{10}$ by 100: $\frac{7}{10} \times 100 = 70\%$.

Answer:

$60\%$

Problem 2: